The link to Cheshire Fishing Supplies is http://www.cheshirefishing.co.uk/sho...page.htm#middy
You want the 4 metre Middy pole priced at £12.99. It comes as a complete 4 metre 4 sectioned rod & the second section from the hand end is the one to use.
This is the cheapest I have found although someone mentioned that the above company sold spare sections for £4.00, but have not checked that out.
Carbon Sheet can be obtained from Free Flight Supplies, for the reinforced areas, the one to use .014"(.35mm)X3"X36", at £12 per sheet.